Polish news sources report The Witcher 3: Wild Hunt will be shown during Microsoft's E3 press conference, confirming its release on the new console.
Heretofore, the RPG had been announced as a "next-generation" title for PC and "high-end consoles", with an announcement following the PlayStation 4 to confirm that yes, Sony's new box is one of those consoles.
Edge has a big cover feature on the CD Projekt Red title in its July issue, which appears to have leaked online.
We're expecting The Witcher 3 in 2014; there are no plans to bring it to current-gen consoles at present, as the developer fears this will compromise its vision. Despite its long lead time, we already know quite a lot about it.